regarding running a script in psql

Hi every one,

Pre Basic Question

Just starting with Postgres

My System – MS Vista

Installed Postgresql 8.4.2

Able to get into psql command tool and create a simple database, using
direction from “Beginning Databases With Postgres”

Try to Run Sql script from a folder on C: that codes several Tables

bpsimple=# \i C:\Program Files\PostGreSql\create_tables-bpsimple.sql

Error
C:: Permission denied

tried also all the following
bpsimple=> \i 'D:\scripts.sql';
D:scripts.sql: No such file or directory
bpsimple=> \i 'D:\\scripts.sql';
D:/scripts.sql: No such file or directory
bpsimple=> \i 'D:/scripts.sql';
D:/scripts.sql: No such file or directory
bpsimple=> \i 'D://scripts.sql';
D:/scripts.sql: No such file or directory
bpsimple=> \i D://scripts.sql;
D:/scripts.sql: No such file or directory
bpsimple=> \i D:/scripts.sql;
D:/scripts.sql: No such file or directory
bpsimple=> \i D:\scripts.sql;
D:: Permission denied
bpsimple=> \i D:\\scripts.sql;
D:: Permission denied

please
guide me